FIELD: physics.
SUBSTANCE: in an optical modulator each pixel or subpixel comprises superimposed fixed flat polariser and movable flat polariser, which is magnetised in the plane of the polariser at a given angle to the transmission plane of the polariser and configured to turn about an axis perpendicular to the polarisers. The optical modulator has means of reading the position of movable polarisers, which include sensors of the direction of the magnetic field (direction of the magnetic induction vector) of each movable polariser and means of retrieving information from the sensors.
EFFECT: reduced image flicker and saving power.
9 cl, 2 dwg
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